wilson



(No Model.)

J; 0. WILSON, Sr.

' GEAR WHEEL.

No. 322,667. Patented July 21, 1885.

NITED STATES PATENT OFFICE".

JOHN O. WILSON, sa, OF NE YORK, N. Y., ASSIGNOR TO FRANCIS T.- LUQUEER, JR, AND JOHN O. WILs N, JR., OF SAME PLACE.

GEAR-WHEEL.

SPECIFICATION forming part of Letters Patent No. 322,667, dated July 21, 1885.

Application filed December 27, 1884. (No model.)

To all whom it may concern.-

Be it known that 1, JOHN G. WILsON, Sr.,

. of the city and State of New York, have invented an Improvement in Gear-Wheels, of which the following is a specification.

Gear-wheels are often required in machinery for light work where there is a rapid mo tion and where the parts should run with but little noise. The Ordinary metallic gearing being rigid cannot be fitted to run very closely because of the risk of breaking the teeth, hence there is usually considerable noise from the contact of the teeth with each other; he sides this, the teeth are not of uniform Strength.

The object of my invention is to produce a gear-wheel that is partially elastic, and that possesses great strength and is very light, and in which the strength of the metal is greatest in the direction of the strain.

In the drawings, Figure 1 is an elevation of a gear-wheel and a portion of a pinion made according to my invention. tion through the rim of the gear-wheel, Fig. 1; and Fig. 3 is aplan view of aportion of the pinion.

The teeth-band is made of a strip of sheet metal, preferably a steel band, of the desired length and width. This is corrugated by means of any suitable bending dies or wheels, the corrugations being of the size of the teeth and the intermediate spaces. The teeth-band a is bent up into a circular form and of the proper size to contain the desired number of teeth and lapped to the extent of one or two teeth, and secured to a suitable pulley or stock. when the pulley is of a sufficient size, I make the same of a hub, d, arms 6, and a metallic rim, 1), and attach the teeth-band to the rim. For a pinion the pulley may be of the desired size and formed in one with the hub, or there may be a rim outside the hub.

In order to attach the teeth-band to the rim or pulley I make use of rivets or screws z, especially where the pulley is solid, such rivets or screws passing into the teeth-band at the bases of the teeth, and at suitable dis- Fig. 2 is a sectances apart-say, every three or four teeth; but I prefer to notch the edges of the rim 6 at equal distances apart on one or both edges and wind a wire, 0, around the rim and into the bases between the teeth, passing the wire from one crossing diagonally inside the band to the next place of crossing. By this construction a very light and partially elastic gear-wheel is produced, and one in which the metal is the strongest in the directionin which the strain arises, and one side of each tooth forms a support for the other side of the tooth.

In wheels for shearing-machines, dental engines, 8tc., it is important that the same be free from noise. This is accomplished to a great extent by my aforesaid improvement; but to render'the same entirely free from noise I face the teeth-strip with leather or similar material, as seen at s. It is preferable to employ an adhesive substance to attach the leather to the sheet metal, and the wire binding will hold the leather as well as the metal to the pulley-band.

\ I claim as my invention 1. The gear-wheel composed of a band of metal forming the rim, arms and a hub sustaining said rim, and a corrugated strip of metal surrounding and attached to said rim and forming the teeth, substantially as set forth.

2. The combination, in a gear-wheel, of a rim, a teeth-band around such rim, and a winding of wire around the teeth-strip and rim to connect them together, substantially as set forth.

3. The combination, in a gear-wheel, of a teeth-band of corrugated sheet metal and a covering to the surface of leather or similar material, and a pulley to' which the teeth-band is attached, substantially as set forth.

Signedby me this 23d day of December, A. D. 1884.

JOHN 0. WILSON, SR. \Vitnesses:

GEO. T. PINOKNEY, WILLIAM G. MOTT. 

